Calculate Your Ideal Weight Fast & Accurately Online
Calculate your ideal body weight based on scientifically validated formulas. This tool considers your height, gender, and age to estimate healthy weight ranges using Robinson, Miller, Devine, and Hamwi formulas.
Results
| Formula | Ideal Weight |
|---|---|
| Robinson (1983) | |
| Miller (1983) | |
| Devine (1974) | |
| Hamwi (1964) | |
| Healthy BMI Range |
How Much Should I Weigh?
Understanding Ideal Body Weight
Most everyone has at some point tried to lose weight, or at least known somebody who has. This is largely due to the perception of an "ideal" body weight, which is often based on what we see promoted through various media such as social media, TV, movies, magazines, etc. Although ideal body weight (IBW) today is sometimes based on perceived visual appeal, IBW was actually introduced to estimate dosages for medical use, and the formulas that calculate it are not at all related to how a person looks at a given weight.
Important Note
IBW is not a perfect measurement. It does not consider the percentages of body fat and muscle in a person's body. This means that it is possible for highly fit, healthy athletes to be considered overweight based on their IBW. It is possible to be over or under your "IBW" and be perfectly healthy.
Key Factors Affecting Ideal Weight
Age
In theory, age shouldn't be a large determinant of IBW past the ages of 14-15 for girls and 16-17 for boys. As people age, lean muscle mass decreases and it is easier to accumulate excess body fat.
Gender
Females generally weigh less than males even though they naturally have a higher percentage of body fat. The male body generally has higher muscle mass, and muscle is heavier than fat.
Height
The taller the person, the more muscle mass and body fat they have. A male at a similar height to a female should weigh about 10-20% heavier.
Body Frame Size
Body frame size can significantly impact ideal weight. It is measured based on the circumference of a person's wrist in relation to their height.
Body Frame Size Guide
| Women's Frame Size | |||
|---|---|---|---|
| Height | Small Frame | Medium Frame | Large Frame |
| Under 5'2" | < 5.5" | 5.5" - 5.75" | > 5.75" |
| 5'2" to 5'5" | < 6" | 6" - 6.25" | > 6.25" |
| Over 5'5" | < 6.25" | 6.25" - 6.5" | > 6.5" |
| Men's Frame Size | |||
|---|---|---|---|
| Height | Small Frame | Medium Frame | Large Frame |
| Over 5'5" | 5.5" - 6.5" | 6.5" - 7.5" | > 7.5" |
Ideal Weight Formulas
Male: 48.0 kg + 2.7 kg per inch over 5 feet
Female: 45.5 kg + 2.2 kg per inch over 5 feet
Invented for medicinal dosage purposes.
Male: 50.0 kg + 2.3 kg per inch over 5 feet
Female: 45.5 kg + 2.3 kg per inch over 5 feet
Similar to the Hamwi Formula, it was originally intended as a basis for medicinal dosages based on weight and height. Over time, the formula became a universal determinant of IBW.
Male: 52 kg + 1.9 kg per inch over 5 feet
Female: 49 kg + 1.7 kg per inch over 5 feet
Modification of the Devine Formula.
Male: 56.2 kg + 1.41 kg per inch over 5 feet
Female: 53.1 kg + 1.36 kg per inch over 5 feet
Modification of the Devine Formula.